Salusbury, Thomas, Mathematical collections and translations (Tome I), 1667
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              <s>
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              means move again faſter, than in the air. </s>
              <s>It onely reſts for me to
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              underſtand, whether in this ſecond motion on the Earth it move
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              more ſwiftly, than in the firſt; for then it would move
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              in
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              tum,
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              alwayes accelerating.</s>
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              <s>SAGR. </s>
              <s>I did not abſolutely affirm, that this ſecond motion is
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              more ſwift than the firſt; but that it may happen ſo to be
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              times.</s>
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              <s>SIMP. </s>
              <s>This is that, which I apprehend not, and which I
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              deſire to know.</s>
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              <s>SAGR. </s>
              <s>And this alſo you know of your ſelf. </s>
              <s>Therefore tell
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              me: When you let the top fall out of your hand, without
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              king it turn round (
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              i. </s>
              <s>e.
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              ſetting it) what will it do at its coming to
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              the ground?</s>
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              <s>SIMP. Nothing, but there lie ſtill.</s>
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              <s>SAGR. </s>
              <s>May it not chance, that in its fall to the ground it may
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              acquire a motion? </s>
              <s>Think better on it.</s>
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              <s>SIMP. </s>
              <s>Unleſſe we let it fall upon ſome inclining ſtone, as
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              children do playing at ^{*}
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              Chioſa,
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              and that falling ſide-wayes upon </s>
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              <s>
                <arrow.to.target n="marg326"/>
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              the ſame, it do acquire the motion of turning round upon its toe,
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              wherewith it afterwards continueth to move progreſſively on the
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              floor, I know not in what other manner it can do any thing but
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              lie ſtill where it falleth.</s>
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              * A Game in
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              Italy,
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              which is, to glide
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              bullets down an
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              inclining ſtone,
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              &c.
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              </s>
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              <s>SAGR. </s>
              <s>You ſee then that in ſome caſe it may acquire a new
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              revolution. </s>
              <s>When then the top jerked up from the ground, falleth
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              down again, why may it not caſually hit upon the declivity of
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              ſome ſtone fixed in the floor, and that hath an inclination that
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              way towards which it moveth, and acquiring by that ſlip a new
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              whirle over and above that conferred by the laſh, why may it
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              not redouble its motion, and make it ſwifter than it was at its
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              firſt lighting upon the ground?</s>
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              <s>SIMP. </s>
              <s>Now I ſee that the ſame may eaſily happen. </s>
              <s>And I
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              am thinking that if the top ſhould turn the contrary way, in
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              riving at the ground, it would work a contrary effect, that is,
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              the motion of the accidental whirl would retard that of the
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              jicient.</s>
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              <s>SAGR. </s>
              <s>And it would ſometimes wholly retard and ſtop it, in
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              caſe the revolution of the top were very ſwift. </s>
              <s>And from hence
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              riſeth the reſolution of that ſlight, which the more skilful Tennis
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              Players uſe to their advantage; that is, to gull their adverſary by
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              cutting (for ſo is their Phraſe) the Ball; which is, to return it
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              with a ſide Rachet, in ſuch a manner, that it doth thereby
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              quire a motion by it ſelf contrary to the projected motion, and ſo
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              by that means, at its coming to the ground, the rebound, which
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              if the ball did not turn in that manner, would be towards the
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              adverſary, giving him the uſual time to toſſe it back again, doth </s>
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